Keypad for e.g. access control keyboard of bank terminal, has safety contact partner producing constant contact with printed circuit board independent from opening-or closing condition of switch contact partner

摘要

The keyboard has a cover plate arranged on a contact plate and a key forming a switch contact partner (13) by pressing against the contact plate. A spring load opens a contact between the switch contact partner and the contact plate, and releases an alarm during disassembly of the cover plate. The switch contact partner and a safety contact partner (10) are assigned to the key, where the safety contact partner produces a constant contact with a printed circuit board independent from opening-or closing condition of the switch contact partner in an assembled condition of the key.